International Standard ISO/IEC 14755 First Edition 1997-08-15 Information technology - Input methods to enter characters from the repertoire of ISO/IEC 10646 with a keyboard or other input device. 5.1 Basic method - beginning sequence, for instance Shift&Ctrl - hexadecimal character number whatever case, shape and length - ending sequence prints, for instance Shift|Ctrl - SPACE should be both: end the current and start the next 5.2 Keyboard symbols entry method - ISO 9995-7 - Shift&Ctrl Tab Tab Release gives U+21E5 5.3 Screen-selection input method - precise searching criteria create user-friendly subset presentation - select character from menu displayed at screen - for instance by typing the menu item's number or pointing at it 5.4 Feedback method for identifying displayed characters for later input - user sees some character on the screen - user points at it and asks for its identification - user gets to read the character's number (and name) - disambiguates between Latin A, Cyrillic A and Greek A 5.5 Unexpected conditions - alarm when an unknown character is entered - but try to preserve data integrity for other applications, i.e. don't simply delete it 6. Conformance Scenario A: 5.1 && 5.4 && 5.5 Scenario B: 5.3 && 5.4 && 5.5 Support for 5.2 is optional